Description
zlib is a Ruby interface for the zlib compression/decompression library. Versions 3.0.0 and below, 3.1.0, 3.1.1, 3.2.0 and 3.2.1 contain a buffer overflow vulnerability in the Zlib::GzipReader. The zstream_buffer_ungets function prepends caller-provided bytes ahead of previously produced output but fails to guarantee the backing Ruby string has enough capacity before the memmove shifts the existing data. This can lead to memory corruption when the buffer length exceeds capacity. This issue has been fixed in versions 3.0.1, 3.1.2 and 3.2.3.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ruby | zlib | < 3.0.1, >= 3.1.0, < 3.1.2, >= 3.2.0, < 3.2.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ruby3.3 | No fix yet | — |
| Debian 13 | ruby3.3 | 3.3.13-0+deb13u1 | — |
| Debian 12 | ruby3.1 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | jruby +1 | No fix yet | — |
| Ubuntu 26.04 LTS | ruby3.3 | No fix yet | — |
| Ubuntu 25.10 | jruby +1 | No fix yet | — |
| Ubuntu 24.04 LTS | ruby3.2 | No fix yet | — |
| Ubuntu 22.04 LTS | ruby3.0 | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | jruby | No fix yet | — |
| Ubuntu 16.04 LTS | jruby | No fix yet | — |
| Ubuntu Pro 20.04 LTS | ruby2.7 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | ruby2.5 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | ruby2.3 | 2.3.1-2~ubuntu16.04.16+esm15 | USN-8556-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | ruby +5 | 3.3.12-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | ruby4.0 +2 | 4.0.6-36.el10_2 | RHSA-2026:50773 |
| RHEL 10 | ruby4.0-rubygem-mysql2 | 0.5.7-36.el10_2 | RHSA-2026:50773 |
| RHEL 10 | ruby4.0-rubygem-pg | 1.6.3-36.el10_2 | RHSA-2026:50773 |
| RHEL 10 | rubygem-bigdecimal | 3.1.5-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-bundler | 2.5.22-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-io-console | 0.7.1-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-irb | 1.13.1-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-json | 2.7.2-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-minitest | 5.20.0-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-power_assert | 2.0.3-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-psych | 5.1.2-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-racc | 1.7.3-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-rake | 13.1.0-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-rbs | 3.4.0-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-rdoc | 6.6.3.1-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-rexml | 3.4.4-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-rss | 0.3.1-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-test-unit | 3.6.1-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygem-typeprof | 0.21.9-14.el10_2 | RHSA-2026:50778 |
| RHEL 10 | rubygems +1 | 3.5.22-14.el10_2 | RHSA-2026:50778 |
| RHEL 9 | ruby +5 | 3.3.12-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-bigdecimal | 3.1.5-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-bundler | 2.5.22-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-io-console | 0.7.1-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-irb | 1.13.1-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-json | 2.7.2-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-minitest | 5.20.0-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-mysql2 +1 | 0.5.5-3.module+el9.8.0+24356+77305e91 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-pg +1 | 1.5.4-2.module+el9.8.0+24356+77305e91 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-power_assert | 2.0.3-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-psych | 5.1.2-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-racc | 1.7.3-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-rake | 13.1.0-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-rbs | 3.4.0-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-rdoc | 6.6.3.1-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-rexml | 3.4.4-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-rss | 0.3.1-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-test-unit | 3.6.1-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygem-typeprof | 0.21.9-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 9 | rubygems +1 | 3.5.22-8.module+el9.8.0+24568+2bbebe96 | RHSA-2026:50828, RHSA-2026:50827 |
| RHEL 8 | ruby +5 | 3.3.12-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-abrt +1 | 0.4.0-1.module+el8.10.0+21226+b78a28c4 | RHSA-2026:50728 |
| RHEL 8 | rubygem-bigdecimal | 3.1.5-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-bundler | 2.5.22-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-io-console | 0.7.1-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-irb | 1.13.1-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-json | 2.7.2-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-minitest | 5.20.0-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-mysql2 +1 | 0.5.5-1.module+el8.10.0+21226+b78a28c4 | RHSA-2026:50728 |
| RHEL 8 | rubygem-pg +1 | 1.5.4-1.module+el8.10.0+21226+b78a28c4 | RHSA-2026:50728 |
| RHEL 8 | rubygem-power_assert | 2.0.3-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-psych | 5.1.2-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-racc | 1.7.3-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-rake | 13.1.0-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-rbs | 3.4.0-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-rdoc | 6.6.3.1-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-rexml | 3.4.4-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-rss | 0.3.1-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-test-unit | 3.6.1-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygem-typeprof | 0.21.9-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
| RHEL 8 | rubygems +1 | 3.5.22-8.module+el8.10.0+24567+c4e5368e | RHSA-2026:50728 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | ruby3.3 +5 | 3.3.10-23.1.hum1 | RHSA-2026:7305 |
| Red Hat Hardened Images 1 | ruby3.4 +5 | 3.4.8-31.1.hum1 | RHSA-2026:7307 |
| Red Hat Hardened Images 1 | ruby4.0 +5 | 4.0.0-33.3.hum1 | RHSA-2026:8838 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | ruby +5 | 3.3.12-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | ruby4.0 +2 | 4.0.6-36.el10_2 | ALSA-2026:50773 |
| AlmaLinux 10 | ruby4.0-rubygem-mysql2 | 0.5.7-36.el10_2 | ALSA-2026:50773 |
| AlmaLinux 10 | ruby4.0-rubygem-pg | 1.6.3-36.el10_2 | ALSA-2026:50773 |
| AlmaLinux 10 | rubygem-bigdecimal | 3.1.5-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-bundler | 2.5.22-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-io-console | 0.7.1-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-irb | 1.13.1-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-json | 2.7.2-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-minitest | 5.20.0-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-power_assert | 2.0.3-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-psych | 5.1.2-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-racc | 1.7.3-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-rake | 13.1.0-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-rbs | 3.4.0-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-rdoc | 6.6.3.1-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-rexml | 3.4.4-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-rss | 0.3.1-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-test-unit | 3.6.1-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygem-typeprof | 0.21.9-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 10 | rubygems +1 | 3.5.22-14.el10_2 | ALSA-2026:50778 |
| AlmaLinux 9 | ruby +5 | 3.3.12-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-bigdecimal | 3.1.5-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-bundler | 2.5.22-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-io-console | 0.7.1-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-irb | 1.13.1-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-json | 2.7.2-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-minitest | 5.20.0-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-mysql2 +1 | 0.5.5-3.module_el9.7.0+184+e2e36072 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-pg +1 | 1.5.4-2.module_el9.7.0+245+447713a2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-power_assert | 2.0.3-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-psych | 5.1.2-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-racc | 1.7.3-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-rake | 13.1.0-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-rbs | 3.4.0-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-rdoc | 6.6.3.1-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-rexml | 3.4.4-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-rss | 0.3.1-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-test-unit | 3.6.1-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygem-typeprof | 0.21.9-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 9 | rubygems +1 | 3.5.22-8.module_el9.8.0+288+22f1c9f2 | ALSA-2026:50828, ALSA-2026:50827 |
| AlmaLinux 8 | ruby +5 | 3.3.12-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-abrt +1 | 0.4.0-1.module_el8.10.0+3799+191214cc | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-bigdecimal | 3.1.5-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-bundler | 2.5.22-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-io-console | 0.7.1-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-irb | 1.13.1-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-json | 2.7.2-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-minitest | 5.20.0-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-mysql2 +1 | 0.5.5-1.module_el8.10.0+3799+191214cc | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-pg +1 | 1.5.4-1.module_el8.10.0+3799+191214cc | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-power_assert | 2.0.3-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-psych | 5.1.2-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-racc | 1.7.3-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-rake | 13.1.0-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-rbs | 3.4.0-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-rdoc | 6.6.3.1-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-rexml | 3.4.4-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-rss | 0.3.1-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-test-unit | 3.6.1-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygem-typeprof | 0.21.9-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
| AlmaLinux 8 | rubygems +1 | 3.5.22-8.module_el8.10.0+4241+4264e34b | ALSA-2026:50728 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | ruby | 3.3.12-14.el10_2 | RLSA-2026:50778 |
| Rocky Linux 10 | ruby4.0 | 4.0.6-36.el10_2 | RLSA-2026:50773 |
| Rocky Linux 9 | ruby | 3.3.12-8.module+el9.8.0+40270+7a73441e | RLSA-2026:50828, RLSA-2026:50827 |
| Rocky Linux 9 | rubygem-mysql2 | 0.5.5-3.module+el9.7.0+40032+36e56d0d | RLSA-2026:50828, RLSA-2026:50827 |
| Rocky Linux 9 | rubygem-pg | 1.5.4-2.module+el9.7.0+40188+314ad260.0.1 | RLSA-2026:50828, RLSA-2026:50827 |
| Rocky Linux 8 | ruby | 3.3.12-8.module+el8.10.0+40269+dc93e2d1 | RLSA-2026:50728 |
| Rocky Linux 8 | rubygem-abrt | 0.4.0-1.module+el8.5.0+668+665814fa | RLSA-2026:50728 |
| Rocky Linux 8 | rubygem-mysql2 | 0.5.5-1.module+el8.10.0+1679+61871737 | RLSA-2026:50728 |
| Rocky Linux 8 | rubygem-pg | 1.5.4-1.module+el8.10.0+1679+61871737 | RLSA-2026:50728 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | ruby2.5 | 2.5.9-150700.24.6.1 | SUSE-SU-2026:1066-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | ruby3.4 | 3.4.10-160000.1.1 | openSUSE-SU-2026:21878-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | ruby | 3.4.9-r0 | — |
| Alpine v3.23 | ruby | 3.4.9-r0 | — |
| Alpine v3.22 | ruby | 3.4.9-r0 | — |
| Alpine v3.21 | ruby | 3.3.13-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | ruby3.4 +5 | 3.4.8-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-bigdecimal | 3.1.8-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-bundler | 2.6.9-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-io-console | 0.8.1-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-irb | 1.14.3-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-json | 2.9.1-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-minitest | 5.25.4-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-power_assert | 2.0.5-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-psych | 5.2.2-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-racc | 1.8.1-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-rake | 13.2.1-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-rbs | 3.8.0-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-rdoc | 6.14.0-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-rexml | 3.4.4-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-rss | 0.3.1-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-test-unit | 3.6.7-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygem-typeprof | 0.30.1-27.amzn2023.0.6 | ALAS2023-2026-1807 |
| Amazon Linux 2023 | ruby3.4-rubygems +1 | 3.6.9-27.amzn2023.0.6 | ALAS2023-2026-1807 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | ruby | 3.3.5-8 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | ruby +5 | 3.3.12-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | ruby4.0 +2 | 4.0.6-36.el10_2 | ELSA-2026-50773 |
| Oracle Linux 10 | ruby4.0-rubygem-mysql2 | 0.5.7-36.el10_2 | ELSA-2026-50773 |
| Oracle Linux 10 | ruby4.0-rubygem-pg | 1.6.3-36.el10_2 | ELSA-2026-50773 |
| Oracle Linux 10 | rubygem-bigdecimal | 3.1.5-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-bundler | 2.5.22-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-io-console | 0.7.1-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-irb | 1.13.1-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-json | 2.7.2-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-minitest | 5.20.0-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-power_assert | 2.0.3-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-psych | 5.1.2-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-racc | 1.7.3-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-rake | 13.1.0-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-rbs | 3.4.0-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-rdoc | 6.6.3.1-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-rexml | 3.4.4-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-rss | 0.3.1-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-test-unit | 3.6.1-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygem-typeprof | 0.21.9-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 10 | rubygems +1 | 3.5.22-14.el10_2 | ELSA-2026-50778 |
| Oracle Linux 9 | ruby +5 | 3.3.12-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-bigdecimal | 3.1.5-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-bundler | 2.5.22-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-io-console | 0.7.1-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-irb | 1.13.1-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-json | 2.7.2-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-minitest | 5.20.0-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-mysql2 +1 | 0.5.5-3.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-pg +1 | 1.5.4-2.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-power_assert | 2.0.3-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-psych | 5.1.2-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-racc | 1.7.3-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-rake | 13.1.0-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-rbs | 3.4.0-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-rdoc | 6.6.3.1-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-rexml | 3.4.4-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-rss | 0.3.1-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-test-unit | 3.6.1-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygem-typeprof | 0.21.9-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 9 | rubygems +1 | 3.5.22-8.module+el9.8.0+90984+bac48209 | ELSA-2026-50828, ELSA-2026-50827 |
| Oracle Linux 8 | ruby +5 | 3.3.12-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-abrt +1 | 0.4.0-1.module+el8.10.0+90287+d51aa4ed | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-bigdecimal | 3.1.5-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-bundler | 2.5.22-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-io-console | 0.7.1-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-irb | 1.13.1-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-json | 2.7.2-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-minitest | 5.20.0-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-mysql2 +1 | 0.5.5-1.module+el8.10.0+90287+d51aa4ed | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-pg +1 | 1.5.4-1.module+el8.10.0+90287+d51aa4ed | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-power_assert | 2.0.3-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-psych | 5.1.2-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-racc | 1.7.3-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-rake | 13.1.0-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-rbs | 3.4.0-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-rdoc | 6.6.3.1-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-rexml | 3.4.4-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-rss | 0.3.1-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-test-unit | 3.6.1-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygem-typeprof | 0.21.9-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
| Oracle Linux 8 | rubygems +1 | 3.5.22-8.module+el8.10.0+90981+a74aefb6 | ELSA-2026-50728 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| RubyGems | zlib | >= 3.2.0, < 3.2.3 | 3.2.3 | GHSA-g857-hhfv-j68w |
| RubyGems | zlib | >= 3.1.0, < 3.1.2 | 3.1.2 | GHSA-g857-hhfv-j68w |
| RubyGems | zlib | < 3.0.1 | 3.0.1 | GHSA-g857-hhfv-j68w |
Advisories 28
- WID-SEC-2026-0595 Ruby: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Nov 8, 2026
- ALSA-2026:50827 Important: ruby:4.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:50828 Important: ruby:3.3 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:50773 Important: ruby4.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:50778 Important: ruby security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:50728 Important: ruby:3.3 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:50828 Red Hat Security Advisory: ruby:3.3 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:50827 Red Hat Security Advisory: ruby:4.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:50773 Red Hat Security Advisory: ruby4.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:50778 Red Hat Security Advisory: ruby security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:50728 Red Hat Security Advisory: ruby:3.3 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:7305 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 6, 2026
- RHSA-2026:8838 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 6, 2026
- RHSA-2026:7307 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 6, 2026
- openSUSE-SU-2026:21878-1 Security update for ruby3.4 SUSE / openSUSE Security Updates · Sep 25, 2026
- RLSA-2026:50728 Important: ruby:3.3 security, bug fix, and enhancement update Rocky Linux Security Advisories · Aug 27, 2026
- RLSA-2026:50773 Important: ruby4.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Aug 27, 2026
- RLSA-2026:50778 Important: ruby security, bug fix, and enhancement update Rocky Linux Security Advisories · Aug 27, 2026
- RLSA-2026:50827 Important: ruby:4.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Aug 27, 2026
- RLSA-2026:50828 Important: ruby:3.3 security, bug fix, and enhancement update Rocky Linux Security Advisories · Aug 27, 2026
- ELSA-2026-50778 Important: ruby security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Aug 14, 2026
- ELSA-2026-50773 Important: ruby4.0 security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Aug 14, 2026
- ELSA-2026-50827 Important: ruby:4.0 security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 10, 2026
- ELSA-2026-50728 Important: ruby:3.3 security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 10, 2026
- ELSA-2026-50828 Important: ruby:3.3 security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 7, 2026
- USN-8556-1 ruby2.3 vulnerabilities Ubuntu Security Notices (USN) · Jul 16, 2026
- ALAS2023-2026-1807 Important: ruby3.4 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 8, 2026
- SUSE-SU-2026:1066-1 Security update for ruby2.5 SUSE / openSUSE Security Updates · Mar 27, 2026